Method using pilot tunnel to process tilting and dumping hydraulic support

Abstract

The invention relates to a method for dealing with crooked and inverted frames of a hydraulic support by using a guide tunnel, comprising the following steps: 1) carrying out guide tunnel construction in front of the tilted or toppled hydraulic support; 2) using an I-shaped steel shed to reinforce the guide tunnel Support; 3) Pull the hydraulic support into the position of the guide tunnel; 4) Upright the hydraulic support in the guide tunnel. The beneficial effect of the present invention is that: the present invention adopts the principle of "controlling the roof first, suppressing roof caving, and then straightening the support", and implements the guide tunnel method to control the surrounding rock, that is, the coal wall is stripped ahead of the coal wall in the crooked frame area of ​​the working face , The stripping area adopts the combined use of anchor rods and steel ladders, the combined use of anchor cables and anchor cable beams, the rhombus net, and the combined support of single pillars and sheds.

Description

technical field [0001] The invention relates to the technical field of coal mine and metal mine mining application, in particular to a method for using a guide tunnel to handle crooked and toppled frames of a hydraulic support. Background technique [0002] Hydraulic support is one of the most important equipments in fully mechanized coal mining face, and it has the largest quantity. It can reliably and effectively support and control the roof of the working face, isolate the goaf, and prevent gangue from entering the mining face and pushing the conveyor. Whether it can work normally is crucial to the safe production and high productivity and efficiency of the entire working face. During the production process of the working face, the hydraulic support is prone to malfunctions such as automatic drop, dead frame, and inverted frame. Once a crooked frame or an inverted frame accident occurs, it will be extremely unfavorable to the management of the roof, damage the electromec...

AI Technical Summary

Problems solved by technology

During the production process of the working face, the hydraulic support is prone to malfunctions such as automatic drop, dead frame, and inverted frame

Once a crooked frame or an inverted frame accident occurs, it will be extremely unfavorable to the management of the roof, damage the electromechanical equipment, and cause serious hidden dangers in production safety. Moreover, the scope of the crooked frame and the inverted frame is large, and it is difficult to deal with it. Long time, seriously restricting safe production

[0003] At present, the commonly used support method is mainly to gradually use external force to adjust with the advancement of the working face. Generally, the method of single prop diagonal brace, hydraulic jack, and chain traction is used. This method has the following disadvantages: 1. Due to the single prop, hydraulic pressure The jack, the chain and the bracket are hard-linked and rigidly contacted. During the period of righting adjustment, the force is large and uneven, and stress concentration is prone to occur, causing accidents of breaking and hurting people, and the safety factor is low; Due to the impact of extrusion, it is difficult to adjust the range of the frame to more than 10cm. When adjusting the lower bracket, measures must be taken to prevent the upper bracket from being squeezed downward. The operation process is cumbersome, labor-intensive, and the effect is poor. 3. Frequent lifting and lowering of the support will damage the roof, the roof is broken, and some parts are hollow, the support cannot be connected to the roof, and there is no initial support force. 4. The processing time is long, and affected by the periodic pressure of the working face, there will be periodic slabs and roof leaks, which are prone to roof accidents, and the treatment effect is good and bad, and it is difficult to control the time; 5. The roof is difficult to control during the processing period. There is a lot of falling gangue, which affects the quality of coal, the speed of advancement is slow, the output is reduced, the economic benefit is poor, and accidents such as gob fire and gas accumulation are prone to occur.

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